/* ═══════════════════════════════════════════════════════
   FOMA — Fear of Missing AI
   Design System
   ═══════════════════════════════════════════════════════ */

* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --black: #0a0a0a;
  --white: #f5f5f0;
  --accent: #ff4d00;
  --accent-glow: #ff6a2b;
  --accent-dim: rgba(255, 77, 0, 0.15);
  --gray: #8a8a8a;
  --dark-gray: #1a1a1a;
  --mid-gray: #2a2a2a;
  --light-gray: #3a3a3a;
  --code-bg: #161616;
  --max-width: 900px;
}

body {
  font-family: 'Inter', -apple-system, sans-serif;
  background: var(--black);
  color: var(--white);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--accent-glow); }

/* ─── Navigation ─── */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 1rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(10, 10, 10, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(42, 42, 42, 0.5);
}

.nav-brand {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: 0.08em;
  color: var(--white);
}

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  font-size: 0.85rem;
  color: var(--gray);
  letter-spacing: 0.02em;
  transition: color 0.2s;
  font-weight: 500;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--white);
}

.nav-mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--white);
  font-size: 1.5rem;
  cursor: pointer;
}

/* ─── Page Layout ─── */
.page {
  padding-top: 5rem;
  min-height: 100vh;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 2rem;
}

/* ─── Page Header ─── */
.page-header {
  padding: 4rem 0 3rem;
}

.page-header .tag {
  display: inline-block;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.5rem;
  padding: 0.35rem 0.9rem;
  border: 1px solid rgba(255, 77, 0, 0.3);
  border-radius: 2px;
}

.page-header h1 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin-bottom: 1rem;
}

.page-header p {
  color: var(--gray);
  font-size: 1.1rem;
  max-width: 600px;
  line-height: 1.7;
}

/* ─── Content Grid ─── */
.content-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--mid-gray);
  border: 1px solid var(--mid-gray);
  margin-bottom: 4rem;
}

.content-card {
  background: var(--black);
  padding: 2rem 2.5rem;
  display: block;
  transition: background 0.2s;
  text-decoration: none;
  color: inherit;
}

.content-card:hover {
  background: var(--dark-gray);
  color: inherit;
}

.content-card-meta {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

.content-type-badge {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  padding: 0.2rem 0.6rem;
  border: 1px solid rgba(255, 77, 0, 0.25);
  border-radius: 2px;
}

.content-type-badge.experiment { color: #00c9ff; border-color: rgba(0, 201, 255, 0.25); }
.content-type-badge.use_case { color: #a855f7; border-color: rgba(168, 85, 247, 0.25); }
.content-type-badge.guide { color: #22c55e; border-color: rgba(34, 197, 94, 0.25); }

.content-card-date {
  font-size: 0.8rem;
  color: var(--gray);
}

.content-card-reading {
  font-size: 0.8rem;
  color: var(--gray);
}

.content-card h3 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.3rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin-bottom: 0.6rem;
  line-height: 1.3;
}

.content-card p {
  color: var(--gray);
  font-size: 0.92rem;
  line-height: 1.65;
}

.content-card-tags {
  display: flex;
  gap: 0.5rem;
  margin-top: 1rem;
  flex-wrap: wrap;
}

.content-tag {
  font-size: 0.72rem;
  color: var(--gray);
  background: var(--mid-gray);
  padding: 0.15rem 0.55rem;
  border-radius: 2px;
}

/* ─── Featured Card (first in grid) ─── */
.content-card.featured {
  padding: 3rem 2.5rem;
}

.content-card.featured h3 {
  font-size: 1.6rem;
}

/* ─── Empty State ─── */
.empty-state {
  text-align: center;
  padding: 6rem 2rem;
  color: var(--gray);
}

.empty-state h3 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.3rem;
  color: var(--white);
  margin-bottom: 0.75rem;
}

/* ─── Article Page ─── */
.article-header {
  padding: 4rem 0 2rem;
  border-bottom: 1px solid var(--mid-gray);
  margin-bottom: 3rem;
}

.article-header .tag {
  display: inline-block;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.5rem;
  padding: 0.35rem 0.9rem;
  border: 1px solid rgba(255, 77, 0, 0.3);
  border-radius: 2px;
}

.article-header h1 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 1.5rem;
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  color: var(--gray);
  font-size: 0.9rem;
  flex-wrap: wrap;
}

.article-meta-dot {
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--gray);
}

/* ─── Markdown Content ─── */
.article-body {
  padding-bottom: 4rem;
}

.article-body h2 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.6rem;
  font-weight: 600;
  margin-top: 3rem;
  margin-bottom: 1rem;
  letter-spacing: -0.02em;
  color: var(--white);
}

.article-body h3 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.25rem;
  font-weight: 600;
  margin-top: 2.5rem;
  margin-bottom: 0.75rem;
  color: var(--white);
}

.article-body h4 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.05rem;
  font-weight: 600;
  margin-top: 2rem;
  margin-bottom: 0.5rem;
  color: var(--white);
}

.article-body p {
  margin-bottom: 1.5rem;
  color: var(--white);
  font-size: 1.02rem;
  line-height: 1.8;
  opacity: 0.92;
}

.article-body strong {
  color: var(--white);
  font-weight: 600;
}

.article-body em {
  color: var(--accent);
  font-style: italic;
}

.article-body ul, .article-body ol {
  margin-bottom: 1.5rem;
  padding-left: 1.5rem;
}

.article-body li {
  margin-bottom: 0.5rem;
  color: var(--white);
  opacity: 0.92;
  line-height: 1.7;
}

.article-body blockquote {
  border-left: 3px solid var(--accent);
  background: var(--dark-gray);
  padding: 1.5rem 2rem;
  margin: 2rem 0;
  font-style: italic;
}

.article-body blockquote p {
  margin-bottom: 0;
  color: var(--white);
  opacity: 0.85;
}

.article-body code {
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
  font-size: 0.88em;
  background: var(--code-bg);
  padding: 0.15em 0.4em;
  border-radius: 3px;
  color: var(--accent-glow);
}

.article-body pre {
  background: var(--code-bg);
  border: 1px solid var(--mid-gray);
  border-radius: 4px;
  padding: 1.5rem;
  margin: 2rem 0;
  overflow-x: auto;
}

.article-body pre code {
  background: none;
  padding: 0;
  font-size: 0.88rem;
  color: var(--white);
  opacity: 0.9;
}

.article-body img {
  max-width: 100%;
  border-radius: 4px;
  margin: 2rem 0;
}

.article-body a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.article-body hr {
  border: none;
  border-top: 1px solid var(--mid-gray);
  margin: 3rem 0;
}

.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 2rem 0;
}

.article-body th, .article-body td {
  border: 1px solid var(--mid-gray);
  padding: 0.75rem 1rem;
  text-align: left;
  font-size: 0.92rem;
}

.article-body th {
  background: var(--dark-gray);
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 600;
  font-size: 0.85rem;
  letter-spacing: 0.02em;
}

/* ─── Back Link ─── */
.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.85rem;
  color: var(--gray);
  margin-bottom: 1rem;
  transition: color 0.2s;
}

.back-link:hover {
  color: var(--accent);
}

/* ─── Section Divider ─── */
.divider {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 2rem;
}

.divider-line {
  height: 1px;
  background: linear-gradient(to right, var(--accent), transparent);
  opacity: 0.3;
}

/* ─── Footer ─── */
.site-footer {
  padding: 3rem 2rem;
  text-align: center;
  border-top: 1px solid var(--mid-gray);
  margin-top: 4rem;
}

.footer-brand {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: 0.05em;
  color: var(--white);
  margin-bottom: 0.5rem;
}

.footer-sub {
  font-size: 0.8rem;
  color: var(--gray);
}

/* ─── Section: Latest Content (Homepage) ─── */
.latest-section {
  padding: 4rem 0 2rem;
}

.section-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 2rem;
}

.section-header h2 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.5rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.section-header a {
  font-size: 0.85rem;
  color: var(--gray);
}

.section-header a:hover {
  color: var(--accent);
}

/* ─── Pagination ─── */
.pagination {
  display: flex;
  justify-content: center;
  gap: 1rem;
  padding: 2rem 0 4rem;
}

.pagination a, .pagination span {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 0.85rem;
  padding: 0.5rem 1.2rem;
  border: 1px solid var(--mid-gray);
  color: var(--gray);
  transition: all 0.2s;
}

.pagination a:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.pagination .current {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-dim);
}

/* ─── Proof / Stats Section (Homepage) ─── */
.proof-section {
  padding: 6rem 2rem;
  max-width: var(--max-width);
  margin: 0 auto;
}

.proof-label {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 2rem;
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  margin-bottom: 3rem;
}

.stat {
  border-left: 2px solid var(--mid-gray);
  padding-left: 1.5rem;
}

.stat-number {
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  color: var(--white);
  line-height: 1;
  margin-bottom: 0.5rem;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--gray);
  line-height: 1.5;
}

.proof-quote {
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(1.2rem, 2.5vw, 1.6rem);
  line-height: 1.5;
  color: var(--white);
  padding: 2.5rem;
  background: var(--dark-gray);
  border-left: 3px solid var(--accent);
  font-weight: 500;
}

.proof-quote cite {
  display: block;
  font-style: normal;
  font-size: 0.85rem;
  color: var(--gray);
  margin-top: 1rem;
  font-family: 'Inter', sans-serif;
  font-weight: 400;
}

/* ─── Subscribe Section ─── */
.subscribe-section {
  padding: 5rem 2rem;
  max-width: var(--max-width);
  margin: 0 auto;
}

.subscribe-inner {
  background: var(--dark-gray);
  border: 1px solid var(--mid-gray);
  padding: 3.5rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.subscribe-inner::before {
  content: '';
  position: absolute;
  top: -50%;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  height: 100%;
  background: radial-gradient(circle, rgba(255, 77, 0, 0.06) 0%, transparent 70%);
  pointer-events: none;
}

.subscribe-inner h2 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 0.75rem;
  position: relative;
}

.subscribe-inner p {
  color: var(--gray);
  font-size: 1rem;
  margin-bottom: 2rem;
  position: relative;
}

.subscribe-form {
  display: flex;
  gap: 0.75rem;
  max-width: 480px;
  margin: 0 auto;
  position: relative;
}

.subscribe-form input[type="email"] {
  flex: 1;
  padding: 0.85rem 1.2rem;
  background: var(--black);
  border: 1px solid var(--mid-gray);
  color: var(--white);
  font-family: 'Inter', sans-serif;
  font-size: 0.95rem;
  outline: none;
  transition: border-color 0.2s;
}

.subscribe-form input[type="email"]:focus {
  border-color: var(--accent);
}

.subscribe-form input[type="email"]::placeholder {
  color: var(--gray);
}

.subscribe-form button {
  padding: 0.85rem 1.8rem;
  background: var(--accent);
  color: var(--white);
  border: none;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: background 0.2s;
  white-space: nowrap;
}

.subscribe-form button:hover {
  background: var(--accent-glow);
}

.subscribe-form button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.subscribe-msg {
  font-size: 0.85rem;
  margin-top: 1rem;
  min-height: 1.2rem;
  position: relative;
}

.subscribe-msg.success {
  color: #22c55e;
}

.subscribe-msg.error {
  color: #ef4444;
}

/* ─── Article Subscribe CTA ─── */
.article-subscribe {
  border-top: 1px solid var(--mid-gray);
  border-bottom: 1px solid var(--mid-gray);
  padding: 3rem 0;
  margin-bottom: 3rem;
  text-align: center;
}

.article-subscribe h3 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.4rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  letter-spacing: -0.01em;
}

.article-subscribe p {
  color: var(--gray);
  font-size: 0.95rem;
  margin-bottom: 1.5rem;
}

/* ─── Related Content ─── */
.related-section {
  padding-bottom: 4rem;
}

.related-heading {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.3rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: 1.5rem;
}

/* ─── Search Page ─── */
.search-form {
  display: flex;
  gap: 0.75rem;
  margin-bottom: 3rem;
}

.search-form input[type="text"] {
  flex: 1;
  padding: 1rem 1.5rem;
  background: var(--dark-gray);
  border: 1px solid var(--mid-gray);
  color: var(--white);
  font-family: 'Inter', sans-serif;
  font-size: 1.05rem;
  outline: none;
  transition: border-color 0.2s;
}

.search-form input[type="text"]:focus {
  border-color: var(--accent);
}

.search-form input[type="text"]::placeholder {
  color: var(--gray);
}

.search-form button {
  padding: 1rem 2rem;
  background: var(--accent);
  color: var(--white);
  border: none;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s;
}

.search-form button:hover {
  background: var(--accent-glow);
}

.search-count {
  font-size: 0.9rem;
  color: var(--gray);
  margin-bottom: 2rem;
}

/* ─── Footer Links ─── */
.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  margin-top: 1.5rem;
  flex-wrap: wrap;
}

.footer-links a {
  font-size: 0.8rem;
  color: var(--gray);
  transition: color 0.2s;
}

.footer-links a:hover {
  color: var(--accent);
}

/* ─── Responsive ─── */
@media (min-width: 640px) {
  .content-grid {
    grid-template-columns: 1fr 1fr;
  }

  .content-card.featured {
    grid-column: 1 / -1;
  }

  .pillars-grid {
    grid-template-columns: 1fr 1fr !important;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(10, 10, 10, 0.95);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 1rem 2rem 1.5rem;
    gap: 0.75rem;
    border-bottom: 1px solid var(--mid-gray);
  }

  .nav-links.open {
    display: flex;
  }

  .nav-mobile-toggle {
    display: block;
  }

  .stat-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .subscribe-form {
    flex-direction: column;
  }

  .search-form {
    flex-direction: column;
  }

  .subscribe-inner {
    padding: 2.5rem 1.5rem;
  }
}